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1. Improving toxicology and environmental health information services: report of the Board of Regents

2. Proceedings of the Conference on Problems of Centralized Documentation: held at Central Air Documents Office, Wright-Patterson Air Force Base, Dayton, Ohio., 11-13 April 1949

6. Charting a course for the 21st century: NLM's long range plan 2006-2016

8. Past, present, and future of biomedical information